Are these the fracture lines that will break the EU?

Europe's border closures due to coronavirus go against a fundamental freedom enshrined in the Schengen Agreement.

Europe's national borders were supposed to have dissolved - the corona crisis has brought them roaring back.

Image: Political Geography Now - base map by Ssolberj (CC BY-SA 3.0)
  • Most EU members have shut their borders to limit coronavirus infection.
  • While understandable, it also goes against one of Europe's most fundamental freedoms.
  • In the longer run, these border closures could threaten the very existence of the EU itself.


To blunt the rise of COVID-19, EU member states have instinctively reverted to the age-old remedy against 'foreign' dangers: tightening controls at their national borders. The measures may be limited to increased ID checks, but in many cases, borders are now closed to all but each country's own citizens. That goes against one of Europe's fundamental freedoms: unhindered movement within the so-called Schengen Area – its recent 25th anniversary was an understandably subdued occasion.

"Sometimes you only realise how much you miss something when it's gone," mused EU Commissioner for Home Affairs Ylva Johansson on 26 March. "Today, more than ever, we realise we can take nothing for granted."

Of course, the current border controls were announced as strictly temporary. But history shows 'temporary' infringements on acquired freedoms are easier to impose than to remove.

The Schengen Area is supposed to be solid blue, but the current crisis has criss-crossed it with old obstacles.

The Schengen Area is supposed to be solid blue, but the current crisis has criss-crossed it with old obstacles.

Image: Political Geography Now - base map by Ssolberj (CC BY-SA 3.0)

This map, published earlier this month by Political Geography Now, shows the current state of affairs within Europe.

The area in blue is the Schengen Area. It is named after the Luxembourg town, symbolically located at the border tri-point with France and Germany where the Schengen Agreement was signed. It has been called the 'crown jewel' of the European project, as it ensures free movement of people and goods within the Area.

However, the Schengen Area (usually referred to as just 'Schengen') does not entirely overlap with the 27-member European Union.

  • It includes only 22 of the EU's 27 member states (in dark blue).
  • Ireland (in yellow) prefers to maintain its passport-less Common Travel Area with the UK (including Northern Ireland).
  • Four of the EU's newest member states - Cyprus, Romania, Bulgaria and Croatia (in green) - are not yet part of Schengen, but are obliged to join when they've implemented the required rules to the EU's satisfaction.
'Schengen' also includes some non-EU countries:
  • Switzerland, Liechtenstein, Norway and Iceland (in greyish blue) are official participants in the Agreement.
  • Monaco, the Vatican, San Marino (in light blue) participate unofficially; despite not having signed the Agreement, they do not normally put up any barriers at their external borders.

Free movement is a core feature of the European project. It has helped foster European cooperation, grow the European economy and – certainly not least – strengthen the ties that bind the peoples of Europe.

For 'Schengen' has given rise to the so-called 'EasyJet Generation': young Europeans for whom freedom of movement is all they've ever known, who have friends and family all across the continent, and who are just as likely to go to university and find jobs outside as inside their native country. For them, closed borders are an entirely new phenomenon.

As the map shows, almost all Schengen Area countries have put up controls at their national borders. Most (in red) have been declared to the EU. In the case of Spain, Poland and Slovakia (in yellow) they are of some other nature. Only the Dutch-German border seems exempt from additional controls.

On the one hand, closing national borders is an understandable reaction to COVID-19. Limiting travel limits social interaction, which limits the spread of the virus. National borders are 'natural' locations for these limits, both in an operational sense – the dormant border infrastructure is easily reactivated – and on a more symbolic level: it allows national governments to underscore the extent of their particular measures.

Thus, national borders, which since 1995 had slid into irrelevance, again re-emerge as markers of substantial differences between European states. And of more trivial ones, as was the case in Baarle, where a shop built across the Belgian-Dutch border was literally half open and half closed.

It's not the first stress test of the Schengen model. In September 2015, Germany re-established checks at its land border with Austria – a response to the large wave of asylum seekers entering the EU from Greece. That measure led to a domino effect, with other countries not wanting to become the last place where the migrants would get stranded. Austria introduced checks on its southern border, with fellow Schengen countries Slovenia and Hungary. Those two, at Schengen's outer limits, soon started turning away migrants at their southern borders. Other countries re-introducing 'internal' border checks within Schengen at that time were France, Belgium, Denmark, Sweden, and Norway.

The Schengen Agreement actually allows for the reinstatement of border controls, but under special circumstances and for a temporary period. Six Schengen countries – Germany, France, Austria, Denmark, Sweden and Norway – have maintained border checks since the 2015 migration wave, although the rationale for the measures may have changed. France, for instance, has used the threat of terrorism to justify the extension of its border controls. The European Parliament has called out this behaviour as unlawful under the Schengen Agreement.

So in fact, Schengen hasn't been truly without border checks since 2015. When the corona restrictions wind down, will some border controls similarly linger on, or will the Schengen countries take the opportunity to hit the reset button and go entirely borderless again? Two good arguments for the latter:

  • In December 2018, a Eurobarometer survey found that 70 percent of respondents consider free movement one of Europe's major achievements. Losing that asset would reduce the European project's legitimacy.
  • Sustained border controls create friction between member states. For example, in 2017, the targeting of Greek airlines at German airports led to a substantial row between the two countries.

The European Commission has plans to shore up the EU's external borders – making it harder to get in, a condition for some stakeholders to accept open internal borders. That plan also calls for a proportional distribution of asylum seekers across member states, which some are likely to veto.

So, with no decisive action on the horizon, the cracks in Schengen could grow wider – confirming in the eyes of many what the corona crisis has demonstrated: that nation states are the most effective level for the exertion of political power, and that supranational institutions like Schengen and the EU are an irrelevance at best.


Map found here at Political Geography Now, reproduced with kind permission. Follow their twitter feed here.

Strange Maps #1023

Got a strange map? Let me know at strangemaps@gmail.com.

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Reactive oxygen species (ROS) accumulate in the gut of sleep-deprived fruit flies, one (left), seven (center) and ten (right) days without sleep.

Image source: Vaccaro et al, 2020/Harvard Medical School
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An unexpected culprit

The new research examines the mechanisms at play in sleep-deprived fruit flies and in mice — long-term sleep-deprivation experiments with humans are considered ethically iffy.

What the scientists found is that death from sleep deprivation is always preceded by a buildup of Reactive Oxygen Species (ROS) in the gut. These are not, as their name implies, living organisms. ROS are reactive molecules that are part of the immune system's response to invading microbes, and recent research suggests they're paradoxically key players in normal cell signal transduction and cell cycling as well. However, having an excess of ROS leads to oxidative stress, which is linked to "macromolecular damage and is implicated in various disease states such as atherosclerosis, diabetes, cancer, neurodegeneration, and aging." To prevent this, cellular defenses typically maintain a balance between ROS production and removal.

"We took an unbiased approach and searched throughout the body for indicators of damage from sleep deprivation," says senior study author Dragana Rogulja, admitting, "We were surprised to find it was the gut that plays a key role in causing death." The accumulation occurred in both sleep-deprived fruit flies and mice.

"Even more surprising," Rogulja recalls, "we found that premature death could be prevented. Each morning, we would all gather around to look at the flies, with disbelief to be honest. What we saw is that every time we could neutralize ROS in the gut, we could rescue the flies." Fruit flies given any of 11 antioxidant compounds — including melatonin, lipoic acid and NAD — that neutralize ROS buildups remained active and lived a normal length of time in spite of sleep deprivation. (The researchers note that these antioxidants did not extend the lifespans of non-sleep deprived control subjects.)

fly with thought bubble that says "What? I'm awake!"

Image source: Tomasz Klejdysz/Shutterstock/Big Think

The experiments

The study's tests were managed by co-first authors Alexandra Vaccaro and Yosef Kaplan Dor, both research fellows at HMS.

You may wonder how you compel a fruit fly to sleep, or for that matter, how you keep one awake. The researchers ascertained that fruit flies doze off in response to being shaken, and thus were the control subjects induced to snooze in their individual, warmed tubes. Each subject occupied its own 29 °C (84F) tube.

For their sleepless cohort, fruit flies were genetically manipulated to express a heat-sensitive protein in specific neurons. These neurons are known to suppress sleep, and did so — the fruit flies' activity levels, or lack thereof, were tracked using infrared beams.

Starting at Day 10 of sleep deprivation, fruit flies began dying, with all of them dead by Day 20. Control flies lived up to 40 days.

The scientists sought out markers that would indicate cell damage in their sleepless subjects. They saw no difference in brain tissue and elsewhere between the well-rested and sleep-deprived fruit flies, with the exception of one fruit fly.

However, in the guts of sleep-deprived fruit flies was a massive accumulation of ROS, which peaked around Day 10. Says Vaccaro, "We found that sleep-deprived flies were dying at the same pace, every time, and when we looked at markers of cell damage and death, the one tissue that really stood out was the gut." She adds, "I remember when we did the first experiment, you could immediately tell under the microscope that there was a striking difference. That almost never happens in lab research."

The experiments were repeated with mice who were gently kept awake for five days. Again, ROS built up over time in their small and large intestines but nowhere else.

As noted above, the administering of antioxidants alleviated the effect of the ROS buildup. In addition, flies that were modified to overproduce gut antioxidant enzymes were found to be immune to the damaging effects of sleep deprivation.

The research leaves some important questions unanswered. Says Kaplan Dor, "We still don't know why sleep loss causes ROS accumulation in the gut, and why this is lethal." He hypothesizes, "Sleep deprivation could directly affect the gut, but the trigger may also originate in the brain. Similarly, death could be due to damage in the gut or because high levels of ROS have systemic effects, or some combination of these."

The HMS researchers are now investigating the chemical pathways by which sleep-deprivation triggers the ROS buildup, and the means by which the ROS wreak cell havoc.

"We need to understand the biology of how sleep deprivation damages the body so that we can find ways to prevent this harm," says Rogulja.

Referring to the value of this study to humans, she notes,"So many of us are chronically sleep deprived. Even if we know staying up late every night is bad, we still do it. We believe we've identified a central issue that, when eliminated, allows for survival without sleep, at least in fruit flies."

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